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2nd International Conference on Mechanical Properties of Materials and Information Technology, ICMPMIT 2013

作者： Zhang, Hui Zhang, Zong Fu Xu, Jia Chu Department of Mechanics and Civil Engineering Jinan University Guangzhou 510632 China Key Lab of Disaster Forecast and Control in Engineering Ministry of Education Jinan University Guangzhou China

ISBN: (纸本)9783037858608

Effective moduli of fiber-reinforced polymer matrix composites filled with nano-particle considering the effect of linear change of interphase are presented in this paper. The three-phase inclusion problem for matrix-interface-particle is equivalent to the Eshelby two-phase inclusion problem. According to the result of the Eshelby inclusion problem, the effective modulus tensor of unit cell of equivalent particle is derived. The effective moduli of equivalent matrix are given based on Mori-Tanaka method. Using two fundamental equation of micromechanic theory, the three-dimensional bridged formulation of unidirectional composites is derived. The quantitative relationship between the macroscopic elastic parameters and the structural parameters of the fiber-reinforced polymer composites filled with nano-particles is investigated. Effects of the thickness of interfacial layer, the particle size and the volume fraction of nanoparticles on the effective elastic moduli of the composites are also discussed. © (2013) Trans Tech Publications, Switzerland.

关键词： Homogenization method

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Effective Elastic Moduli of Fiber-reinforced Polymer Matrix Composites Filled with Nano-particle

Effective Elastic Moduli of Fiber-reinforced Polymer Matrix ...

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2013 2nd International Conference on Mechanical Properties of Materials and Information Technology(ICMPMIT 2013)

作者： Hui Zhang Zong-fu Zhang Jia-chu Xu Department of Mechanics and Civil Engineering Jinan University Key Lab of Disaster Forecast and Control in Engineering Ministry of EducationJinan University

关键词： Nano-particles Interface phase Composite materials Effective modulus Homogenization method

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Structural damage detection using response phase space for beam-like structure under a moving load

Structural damage detection using response phase space for b...

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20th International Congress on Sound and Vibration 2013, ICSV 2013

作者： Nie, Zhenhua Jiang, Hui Ma, Hongwei College of Science and Engineering Jinan University Guangzhou Guangdong 510632 China Seismological Bureau of Guang Dong Province Guang Zhou Guang Dong China Key Laboratory of Disaster Forecast and Control in Engineering Ministry of Education of China Guangzhou Guangdong 510632 China

ISBN: (纸本)9781629931500

Ideally, structural health monitoring of civil infrastructure consists of determining, by measured parameters, the location and severity of damage in the structure. Many structural Vibration parameters have been used to identify and quantify damage. Using parameters based on structural Vibration phase space features for damage detection is a new field in structural health monitoring. In this paper, a new damage detection method based on phase space of a single response is proposed. Firstly, the defmition of phase space of Vibration system is introduced. Then a new damage index named CPST (changes of phase space topology) based on topology changes of the phase space of Vibration signals under a moving load is introduced. The phase space of the dynamic response is constructed by the velocity and acceleration responses. The CPST values are calculated from the constructed phase space and used to identify structural damage. The main idea is that when the moving load passing by the damage location, the CPST curves have a singular point, which is used to locate the damage location. To demonstrate the method, the dynamic responses of a point on a beam-like structure are measured under different damage severity are used to calculate CPST for damage detection. The results indicate the CPST curves can successfully identify damage location and quantification. The proposed method is a good candidate for damage detection since only one sensor is needed.

关键词： Damage detection

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Study on safety assessment of gas station based on fuzzy theory

Study on safety assessment of gas station based on fuzzy the...

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2nd International Conference of Electrical and Electronics engineering, ICEEE 2011

作者： Jing-Cheng, Liu Hong-Tu, Wang Wen-Hua, Li Shun-Peng, Zeng Yu, Ma Chongqing University Key Lab. for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering Ministry of Education Chongqing China Chongqing University of Science and Technology Institute of Oil and Gas Engineering Chongqing China

ISBN: (纸本)9783642260063

Gas Station safety is non-linear systems that refer to many factors and multilayer. There are much flammable and explosive compressed natural gas in gas station, and it is considered as a kind of major hazard source. Therefore, the safety assessment of gas station has their special important and realistic significance. Based on the types of accident and risk factors, a new index system of safety assessment was set up. The weight of the evaluation index would be analyzed by analytic hierarchy process, and then the matrix of evaluating results could be calculated through fuzzy comprehensive evaluation. At last, the grade of safety for gas station could be obtained. This Safety Assessment Model can be applied for every gas station. © 2012 Springer-Verlag.

关键词： Safety engineering

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Study on fractal-like dissociation kinetic of methane hydrate and environment effect

Study on fractal-like dissociation kinetic of methane hydrat...

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2nd International Conference of Electrical and Electronics engineering, ICEEE 2011

作者： Feng, Xu Qiang, Wu Lihua, Zhu Key Lab. for the Exploitation of Southwestern Rsrc. and the Environ. Disaster Control Engineering Ministry of Education Chongqing University Chongqing China School of Safety Engineering and Technology Heilongjiang Institute of Science and Technology Harbin China

ISBN: (纸本)9783642260063

By using observation method, the dissociation process of methane hydrate at normal temperature and pressure is studied, and it is discovered which the dissociation of methane hydrate isn't occurred synchronously at whole surface, but heterogeneous characteristic of dissociation is emerged. The dissociation rate of hydrate is slow at normal temperature and pressure, and average dissociation rate is 2.15x10-4m3·h-1. The dissociation kinetic equation of methane hydrate is proposed. It is revealed that the dissociation of methane hydrate at normal pressure is a pseudo first-order reaction. The dissociation rate coefficient of methane hydrate in different time is calculated, and the result shows that the rate coefficient is relative to reaction time, namely the dissociation kinetics of methane hydrate does not tally with the typical kinetics law, and the dissociation reaction kinetics of methane hydrate is fractal-like. Lastly, the environment effent of hydrate dissociation is also analyzed. © 2012 Springer-Verlag.

关键词： Hydration

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Quasi-Green’s function method for free vibration of clamped thin plates on Winkler foundation

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Applied Mathematics and Mechanics(English Edition) 2011年第3期32卷 265-276页

作者：李善倾袁鸿 Institute of Applied Mechanics Key Laboratory of Disaster Forecast and Control in Engineering of Ministry of Education of ChinaJinan University

The quasi-Green＇s function method is used to solve the free vibration problem of clamped thin plates on the Winkler foundation. Quasi-Green＇s function is established by the fundamental solution and the boundary equation of the problem. The function satisfies the homogeneous boundary condition of tile problem. The mode-shape differential equation of the free vibration problem of clamped thin plates on the Winkler foundation is reduced to the Fredholm integral equation of the second kind by Green＇s formula. The irregularity of the kernel of the integral equation is overcome by choosing a suitable form of the normalized boundary equation. The numerical results show the high accuracy of the proposed method.

关键词： Green＇s function integral equation clamped thin plate Winkler foundation,free vibration

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Line feature enhancement using a new shift-invariant non-aliasing ridgelet transform

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2012年 7145 LNCS卷 272-281页

作者： Yan, He Fu, Youjia Yin, Guangzhi Key Lab. for the Exploitation of Southwestern Rsrc. and the Environ. Disaster Control Engineering Ministry of Education Chongqing 400044 China College of Computer Science Chongqing University of Technology Chongqing 400054 China

ISBN: (纸本)9783642290497

A new shift-invariant non-aliasing Ridgelet transform was presented to avoid aliasing and shift-variant in old Ridgelet transform. Firstly, image size was expanded twice via interpolating zero values,so that the sampling rate in Radon transform domain was improved and the aliasing was reduced;Secondly, the one-dimensional discrete wavelet transform in the old Ridgelet transform was replaced by one-dimensional dual-tree Complex wavelet transform(DCWT) which had both shift-invariant and double directional analysis ability. On this basis, a new image enhancement method for linear features was proposed by using zero-mean Gaussian mode in the shift-invariant non-aliasing Ridgelet transform domain. Experimental result shows that the presented Ridgelet transform can avoid effectively the 'scratch around'phenomenon in reconstructed image and the visual effects of the image enhancement is improved obviously. © 2012 Springer-Verlag Berlin Heidelberg.

关键词： Image enhancement

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Dynamic analysis of non-uniform continuous girder bridge under moving vehicle

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1st International Conference on Civil engineering, Architecture and Building Materials, CEABM 2011

作者： Chen, Zhigang Peng, Zilin Key Lab. of Disaster Forecast and Control in Engineering Ministry of Education of the People's Republic of China Jinan University Guangzhou 51632 China Department of Mechanics and Civil Engineering Jinan University Guangzhou 51632 China

ISBN: (纸本)9783037851258

For non-uniform continuous bridge in actual projects, the theoretical analysis and field testing of the dynamic response under moving vehicle are carried out. Firstly, Euler-Lagrange equation is applied to derive the vibration equation of three-axle vehicle. Then one obtains the dynamic analysis model by using the finite element method and the vehicle-bridge interaction equation based on the displacement coordination relationship of the contact between wheels and bridge. Lastly, numerical solutions are presented according to the dynamic response of the bridge, compared with the real values. The results show that: the roadway roughness and vehicle speed strongly influence the impact factor. © (2011) Trans Tech Publications.

关键词： Dynamic response

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Preparation of TeO_x-SiO_2 film with excellent third-order nonlinear optical properties by electrochemically induced sol-gel method

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Chinese Chemical Letters 2011年第11期22卷 1359-1362页

作者： Qiang Li Min Gu State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam Key Lab for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering of Education Ministry College of Resources and Environmental Science Chongqing University Chongqing 400044 China

TeOx-SiO2 composite films having third-order nonlinearities were prepared by electrochemically induced sol-gel deposition method on ITO *** third-order optical nonlinearities of the films were measured by Z-scan *** third-order nonlinear susceptibilities（χ^（（3））） of the as-prepared films are 5.9×10^（-7） to 4.29×10^（-6）*** surface morphology and composition of the films were characterized by SEM/EDX,which identified that Te metallic particles well dispersed in TeO_x-SiO_2 gel films.

关键词： TeOx-SiO2 composite Electrochemically induced sol-gel method Third-order nonlinearities Z-scan

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Simulation on the deformation and failure response features and stability of a slope from open pit mining to underground mining under the effecting of excavation goaf by the floor friction model

Beijing Keji Daxue Xuebao/Journal of University of Science a...

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Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing 2012年第3期34卷 231-238页

作者： Yin, Guang-Zhi Li, Xiao-Shuang Li, Yao-Ji State key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing 400030 China Key Lab. for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering Ministry of Education of China Chongqing University Chongqing 400030 China National Engineering Research Center of Phosphate Resources Development and Utilization Kunming 650000 China Yunnan Phosphate Chemical Group Co. Ltd. Jinning 650600 China

Based on the gently inclined medium thick phosphate rock at the deep part of the east mining section of Jinning-Six Mine, Yunnan Phosphate Co. Ltd. from open pit mining to underground mining, floor friction model tests under the condition of different slope heights and boundary thicknesses were carried out with a floor friction model instrument. The results show that the deformation and failure response features of the slope can be divided into three stages: fracture and loose in a small range, unstable failure in a local range, and instability failure in the whole range of slope rock sliding to the goaf. The main deformation and failure modes of the slope are tension cracking, breakage, and sliding failure. When the slope height is fixed, with the boundary thickness gradually decreasing from 30 m to 20 m and 10 m, the stability of the slope is directly proportional to the boundary thickness, and the reasonable boundary thickness is 20 m to 30 m. When the boundary thickness is fixed, with the slope height increasing from 60 m to 108 m, the stability of the slope is inversely proportional to the slope height, and the slope of 108 m from open pit mining to underground mining is unstable.

关键词： Slope stability

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